TC CALIBRATIONS RTD4 needs-mpvi which keeps the tuning file

which keeps the tuning file protected and prevents accidental changes

Tired of them pesky dash messages or just not driving the way it should

Dealer EZLynk 16-22 6

Dealer HPTuners 03-07 6

8L LWN Tunes

TC CALIBRATIONS RTD4 needs-mpvi which keeps the tuning fileThe HP Tuners RTD4 is a remote tuning device used to read, flash, and data log your vehicle. It allows us to send you custom tuning files without needing the truck or vehicle here in person. Once you receive the RTD4, you will use it to read your vehicles factory file and send it to us through the free TDN app. We then build your custom tune and send it back through the app. After that, you can use the RTD4 to flash the tune into your vehicle. The